Excitation Mechanisms in Moderate-Energy K^+-Ne Collisions(Atomic and molecular physics)

概要

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By means of differential scattering spectroscopy, excitation processes in K^+-Ne collisions have been studied at laboratory collision energies of 350[<!-]E_<lab>[<!-]2000eV. Doubly differential cross sections σ(Θ)_k have been measured over a wide range of center-of-mass angles, 3[<!-]Θ[<!-]176°, by detecting all the scattered particles (K^+, K, Ne^+, Ne), where subscript k means exit channels in the reactions. Excitations were observed appreciably at reduced angles of τ>4keV deg and collision energies of E_<lab>[>!-]1000eV. At 1000[<!-]E_<lab>[<!-]1500eV, only one-electron excitations have been found, while at E_<lab>[>!-]1500eV, two-electron excitation has been observed in addition to one-electron excitations. The electronic transitions are classified into two types depending on the excitation mechanism. One is the one-electron transitions taking place at internuclear distances of R<R_<C1>=1.08Å, and the other is one- and two-electron transitions occuring at R<R_<C2>=0.45Å. Both the distances R_<C1> and R_<C2> are nearly equal to those for the isoelectronic system of Na^+-Ar studied previously.
社団法人日本物理学会の論文
2007-04-15